Journal-bearing and process of making same.



PATBNTED JUNE 25, 1907. 1

1). H. STEWART} JOURNAL BEARING AND PROCESS OF MAKING SAME.

APPLIUATIO] FILED SEPT. 15, 1905.

k ww

UNITED STATES PATENT OFFICE.

JOURNAL-BEARING AND PROCESS OF MAKING SAME.

Specification of Letters Patent.

7 Patented June 25, 1907.

Application filed September 15, 1905. Serial No. 278.616

To all whom, it may concern:

Be it known that I, DAVID H. STEWART,

residing inPittsburg, in the county of Alle-.

gheny and; State of Pennsylvania, have invented certain new and usefulImprovements in Journal-Bearings andFrocesses of Making Same, of whichthe following is a specification.

My present invention seeks to provide an improved construction ofjournal bearing anti-friction metal in shredded or comminuted formandcompressing same in a solid mass within a holder or receiver.

In its more specific nature, my present invention c'omprehends animproved construction of journal bearing, comprising a box of cast metalhaving a main bearing surface .of shredded or comminuted particles ofbearing metal compressed together with a solid lubricant, suchasgraphite, and provided with supplemental bearing metal surfaces combinedwith the main bearing surface ina manner to keep the cast metal box orshell from contacting with the journal.

In its still more specific nature, my inven tion consists of an,improved construction of journal bearing or box consisting of thedetails of construction and novel arrangement of parts hereinafter fullyexplained, specifically pointed out in the claims and illustrated in theaccompanying drawin s, in which,

Fi ure 1, 1s a; longitudinal section of the simp est form of 111 journalbearing. Fig. 2, is a cross section t ereof on the line 22 on Fig. 1Fig. 3, is a longitudinal section of the referred form of my improvedjournal bearing. Fig. 4, is a cross section thereof on the line 44 ofFig. 3. Fig. 5, is a detail view showin the manner in which the hearingmetal su stanceis shredded before it is proved manner.

suitable material which is first reduced to a shredded or oomminutedform in any a lffhen thus reduced, I ta e the shredded or comminutedmassand immerse the same in water to become thoroughly saturated, afterwhich in its saturated condition, it is immersed in a solidlubricant,'such as graphite, to such extent, that the shredded orcomminuted particles become fully covered with the lubricant. the coatedand moist condition, the shredded or comminuted mass is reduced bycompression intoa solidrnass to the form of a journal bearing. Thislatter step of my method or process is preferably done in the followinmanner A shell or holder 10 of cast metahaving a pocket or chamberformed with under cut end and side edges is utilized, into which thesaturated coated mass is forced under a heavy pressure to the extent ofositively filling the pocket ofthe shell and eaving the bearing surfaceof the reviously treated mass of anti-friction meta projected beyond theplane of the under edges of the shell 10 as shown in the simplest formof my invention illustrated in Fig. 1 and when arranged in the form justdescribed, the entire under or bearin surface of the bearing willconsist of a highly compressed mass of threads or comminuted particlesof antifriction bearing metal.

vIn the preferred form of my invention, before forcing the saturated andcoated antii'riction bearing metal particles into the shell 10, I insertinto the shell 10 a supplemental bearing member of bronze metal, whichmember designated S, consists of a rectangular-frame S'that snugly fitsinto the sides and ends of the cast metal shell or holder 10 and formedat the ends and sides with a shouldered rectangular extension S S, theend portions of which extend under'the ends of the cast shell or framewhile the sides are likewise shouldered and extended under the loweredges of the shell 10, thus providing as it were, a soft bearinsubstance on the under edges of the shel that will engage the axle orshaft and form as it were, a supplemental bearing member for the shellor box which can be readily replaced in case of wear. The member S isheld to its place on the shell by the com pressed mass of the mainbearing body M, which engages the journal at points between the ends andsides of the shell or casing. The side member of the supplemental or andthe necessity of destroying or selling the bronze metal frame need nothowever, extend under the sideedges of the frame, since the width of'theshell can be such that the main or compressedmassof saturated metalshreds can be so formed that its opposite sides will extend sufiicientlybeyond the opposite edges of the journal or shaft, see Fig. 7 to take upconsiderable wear before the sides of the shell 10 proper could movedown and contact with the journal. Instead of shredding theanti-friction bearing metal, the same could be pulverized and mixed withthe graphite and in its mixed-or saturated condition, pressed into.theshell, but I prefer to shred the metal as before stated.

By reason-of construction, a bearing made in the manner stated, will atonce in use, assure a proper-lubrication on the entire bearing surfaceand little orno oil will ret uired to prevent Wear and heating.

While I have-stated the shell 10 as being cast, it is manifest suchshell may be pressed and'the shape, per 86, of the shell.- may' bemodified to suit-the special journal cdnstruction for which a bearingmay be required.

Among the advantages obtained by my invention is, it can bemanufactured-much cheaper and will give longer service than is new foundin the use of the types of bearings before referred to, and when usingthe pre ferred form, the main shell can be easily re- ,newed, that-isresupplied with a new bearing substance, since a new supplemental bronzebearing frame-can be substituted for the old shells for scrap after thebearing surfaces are 1 once worn, as is now the practice in the ordinarytypes of journalbearings' of the-kind stated is avoided. v

Having. thus described my invention, what I claim and desire to secureby Letters Patent, is:

1. A process of producing journal'bearings, which consists of reducing asuitable anti-friction bearing metal into a shredded form, immersing thesame in its shredded state in water, then coating same with metal shell;of a bearing metal member adapted to detachably fit over the. lower sideand end edges of the shell, said member having internal inwardly beveledflanges and a composition consisting of a highly compressedgraphitecoated shredded mass, held withinthe shell and the detachable bearingframe substantially as shown and described.

DAVID H. STEWART.

Witnesses:

ALBERT Roenns, L. A. Voonnon'r.

graphite or other like lubricant and then "compressing the moist andlubricant coated

